Born: 22 Feb 1849 in Tula, Russia

Died: 27 Feb 1915 in Petrograd (now St. Petersburg),
Russia

See a Russian article from the Brokhaus & Efron Dictionary

Sonin worked on special functions, in particular cylindrical functions. He also worked on the Euler- Maclaurin summation formula.

Other topics Sonin studied included Bernoulli polynomials and approximate computation of definite integrals, continuing Chebyshev's work on numerical integration.

Together with A A Markov, Sonin prepared a two volume edition of Chebyshev's works in French and Russian.

Article by: *J.J. O'Connor and E.F. Robertson*

Source: MacTutor History of Mathematics archive